New phone, no sim - what message app can i use?

[ivrytwr3]

Morning all,

I am getting a phone for my young daughter for xmas - although there will be no sim until next year for her (she wants it for music, vids, apps etc).

But i would like her to be able to instant message - is there an app i can use for this?

 

[ivrytwr3]

i would prefer whatsapp as that is what we all use, but i thought it required a sim!

Thanks all.